Waterproof seam for composition-board.



A. G. PAFFENBARGER.

WATERPROOF SRAM FOR omPosmoN BOARD.

APPLICATION FILED JULY 22. L9l8.

Patented Apr. 8,1919.

WITNESSES III,"

l mfwf Paffezz az er, By M A TTUHNEYS ALFRED GERALD PAFFENBARGER., vOF LOS ANGELES, CALEFORNIA.

WATERPROOF SEAM FOB COMPOSITION .-BOBD.

Specication of Letters Patent.

Patented Apr. 8, 1919.

' :application med July 22, lala. serial No. 246,148.

7 Vall whom, t may concern:

Be it known that I, ALFRED G. PAFFEN BARGER, a citizen of the United States, and

a resident of LosAngeles, in the county of tight joints secured.

LosAngeles and State of California, have invented a new and lmproved Waterproof Seam for Composition-Board, of which the following is a. full, clear, and exact description.

This invention relates to a waterproof joint for` composition and other boards whereby the same can be used for roofs, walls and other exterior work, and the principal object of the present invention is to provide an overlapping flexible seam joiner of comparatively simple and inexpensive construction and so designed that the boards can be easily and quickly laid and water- A more specific obj ect of the invention is the provision of a flexible seam cover or joiner in the form of a fabric strip of novel construction which is impregnated with a waterproof material, there being such a strip along -two edges of a board so that when the boards are laid the seam cover or joiner on one board will overlap the side edge and an end edge of two adjacent boards,.and as a consequence all the seams will be sealed by a flexible member, and the entire external surface of the roof or wall made in this manner will be further waterproofed by a coating of suitable waterproof material, and further protection may be obtained by a coating of paint.

Another object of the invention is the provision of novel fastening devices attached to the boards whereby the latter can be easily, quickly and securely fastened to the sheetin boards or other supporting surface.'

With such and other objects in view, the invention comprises various novel features of construction and arrangement of parts which will be set forth lwith particularity in the following description and claims appended hereto.

In the accompanying drawing, which illustrates one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, l

Figure 1 is a plan view of a portion of a roof made of composition 'or like boards with the improved waterproof joint employed;

Fig. 2 is an enlarged sectional view on the line 2 2, Fig. l.

F ig. 3 is a detail sectional view'of one edge of a board before being applied;

Fig. 4: is a perspective view of a portion of the seam joiner or cover;

Fig. 5 is -a perspective view of a composition board with the seam joiner applied to two edges thereof.

Referring to the drawing, 1 .designates sections of composition board or equivalent material now in common use for forming walls and partitions. rlhese sections are fastened to a suitable supporting surface formedby sheeting boa-rds or the like, and the joints are rendered waterproof by an improved overlapping flexible seam joiner that constitutes the subject matter .of the present invention, and which makes it possible to use composiion and equivalent boards for roofs, walls and other exterior purposes. Along two edges of a board 1, as shown in Fig. 5, is arranged the seam joiner or cover A. In the present instance this is made as an Lsl1aped piece of cotton fabric, canvas or the like, impregnated with paraiiin or equivalent waterproof compound. The joineris'several inches wide. so that onehalf of each member is cemented or otherwise secured to the outer surface of the board 1 with the rest of the strip projecting beyond the board so as to overlap the next boards adjacent to it. Extending longitudinally and centrally of each member of the E -shaped seam joiner or cover and secured thereto by stitches 2 is a narrow strip 3 of cotton, canvas or other fabric which is impregnated with paraffin or equivalent waterproof material. Thus, as shown in Fig. 4, the joiner is T-shaped in cross-section and the strip 3 will lie between adjacent edges 4 and 5 of juxtaposed boards l, as clearly shown in Fig. 2. If the composition board is about one-quarterof an inch thick the sealing strip 3 will be about one-half of an inch thick so that the free edge 6 will lap under the board to which the joiner is attached. The joiner or cover A is cemented to the composition board along the two edges thereof, as shown in Fig., 5, and consequently when the boards are laid edge to edge all the joints or seams will be thoroughly sealed and covered. The overlapping portion 7 -of the joiner A will be cemented to the next board, and when al1 the boards are laid and the joiners sealed, a coating of waterproof material 8 will be applied on the roof or wall. The boards are. fastened at the edges 9 and 10 that are devoid of a joiner by nails 11, as shown in Fig. 1, the nails being close to the margins, so that the flap 7 of the joiners will cover the nails and seal the perforations made thereby.

The other two edges, that is to say, the edges to which the joiner is'applied, are provlded with a plurality of metal fasteners in the the advantages of the construction andmethod of operation will be readily understood by those skilled in the art to whichthe invention appertains, and while have describedl the principle of operation, together with the device which l now consider to be the best embodiment thereof, l desire to have it understood that the device shown is merely illustrative and. that such changes may be made when desired as fall within the scope of the appended claims.

Having thus described my invention, 'f claim as new and desireto secure by Letters Patent:

1. Aboard having a seam joiner attached to an edge thereof, said joiner comprising a iexible strip of T-shaped cross-section, a portion of the top member adhering to the top surface of the board and the remainder of fthe top member projecting beyond the edge of the board, and the vertical member of the strip being cemented to the edge of the board. '2. A board having a seam joiner attached to an edge thereof, said joiner comprising a flexible strip of T-shaped cross-section, a portion of the top member adhering to the top surface of the board and the remainder of the top member projecting beyond the edge of the board, and the vertical member of the strip bein gemented to theI edge of the board, and a so cemented to the under side of the latter, and fasteners secured to the under side of the board at the edge having the strip, and said fasteners projecting outwardly from the board.

3. A board having a seam joiner along two contiguous edges, said joiner being attioned fasteners of each board bein tached to the outer face of the board and projecting beyond the edges thereof and also ing along two contlguous edges a seam joiner which comprises a strip of fabric impregnated with waterproof material and having a portion adhering tothe top surface of the board and another portion projecting therefrom to overlap adjacentboards and also having a portion covering the edge and lapping under the board.

6. 'l-he combination of a plurality of boards laid edge to edge and each board having along two contiguous ed es a seam joiner which comprises a strip o fabric impregnated with waterproof material and having a portion adhering to the top surface of the board and another portion projecting therefrom to overlap adjacent boards and also having-a portion covering the'edge and lapping under the board, fastening members secured to the under side of each board at those edges having the seam j oiner and projecting beyond such ed the boards are pd into the foundation.

l7. The combination of a plurality of boards laid edge to edge and each board having along two contiguous edges a seam joiner whichcomprises'a strip of fabric impregnated with waterproof material and having a portion adhering to the top surface of the board and another portion projecting therefrom to overlapadjacent boards and also having a portion covering the edge and lapping under the board, fastening members secured to the under side of each board 'at those edges having the seam joiner and projecting beyond such edges, a foundation on which 'the boards are placed, fasteners passin through the fastening members and driven into the foundation, and fasteners passing through the boardsl at the edges that do not have a seam joiner, said last-mencovered by seam j oiners of adjacent boar s.

ALFRED GERALD PAFFENBARGER.

es, a foundation on whiehy aced, and fasteners passing. through the fastening members and driven' 

